package com.ra.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Add common response to the client
 * 
 * @author Jerry
 *
 */
public class ResponseFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		
	}

	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
			FilterChain chain) throws IOException, ServletException {
		HttpServletResponse response = (HttpServletResponse) servletResponse;
		HttpServletRequest request = (HttpServletRequest) servletRequest;
		String strRorigin = request.getHeader("origin");
		if (strRorigin != null) {
			response.setHeader("Access-Control-Allow-Origin", strRorigin);
		}else{
			response.setHeader("Access-Control-Allow-Origin", "http://localhost");
		}
		response.setHeader("Access-Control-Allow-Credentials", "true");
		chain.doFilter(servletRequest, servletResponse);
	}

	@Override
	public void destroy() {
		
	}
}
